首页|Triphenylamine-based fluorophores bearing peripheral diazine regioisomers.Synthesis,characterization,photophysics and two-photon absorption
Triphenylamine-based fluorophores bearing peripheral diazine regioisomers.Synthesis,characterization,photophysics and two-photon absorption
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NSTL
A series of six tripodal push-pull fluorophores with D-(π-A3)arrangement has been designed and synthesized.The structure of these fluorophores consists of a central electron-donating triphenylamine core and peripheral electron-withdrawing diazine units(pyridazine,pyrimidine,and pyrazine moieties),which are linked by an ethynylene π-spacer.The preparation of the fluorophores involves threefold Sonogashira cross-coupling reaction starting from the key tris(4-ethynylphenyl)amine intermediate.The structure and spatial arrangement of two fluorophores were completely confirmed by X-ray analysis.Thermal and electrochemical behavior of prepared fluorophores were investigated by differential scanning calorimetry and cyclic voltammetry.Their linear optical properties were examined by UV-Vis absorption,steady-state and time resolved fluorescent spectroscopy while 2 PA analysis was used for a study of the nonlinear optical response.Experimental data were supported by DFT calculations.Based on the experimental as well as theoretical data,structure-property relationships have been thoroughly revealed.
NSTL
